The marks obtained by seven students are 70, 85, 95, 86, 74, 83 and 67. What are the average marks obtained by them?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 80.
We know that,
Average = Sum of observations/Number of observations
Average = (70 + 85 + 95 + 86 + 74 + 83 + 67)/7
⇒ 560/7 = 80